1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
$$\alpha $$-particale consists of :
A
2 electrons, 2 protons and 2 neutrons
B
2 electrons and 4 protons only
C
2 protons only
D
2 protons and 2 neutrons only
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A body weight 200 N on the surface of earth. How much will it weight half way down to the centre of the earth?
A
200 N
B
250 N
C
100 N
D
150 N
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Pick the wrong answer in the context with rainbow.
A
An observer can see a rainbow when his front is towards the sun.
B
Rainbow is a combined effect of dispersion refraction and reflection of sunlight.
C
When the light rays undergo two internal reflections in a water drop, a secondary rainbow is formed.
D
The order of colours is reversed in the secondary rainbow.
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?
A
1 J
B
2 J
C
3 J
D
30 kJ
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